在西藏拉萨的两个Asteraceae入侵植物的适应分析
Zhefei Zeng1,2, Ziyi Liang1, Yan Chen1
1Key Laboratory of Biodiversity and Environment on the Qinghai-Tibetan Plateau, Ministry of Education, School of Ecology and Environment, Tibet University, Lhasa, China.
PeerJ
|July 11, 2025
概括
侵入性植物Bidens pilosa和Tagetes minuta在西藏拉萨显示出各种各样的建立潜力. 高海拔压力影响种子质量,但变暖趋势可能有利于入侵物种的扩张.
科学领域:
- 生态生态学 生态生态学
- 侵入性物种 生物学 生物学
- 高海拔地区的生态系统
背景情况:
- 侵入性植物威胁着全球生态系统,特别是脆弱的高海拔地区,如西藏高原.
- 西藏高原的独特条件使其易受生物入侵.
- 了解入侵物种的建立对于有效管理至关重要.
研究的目的:
- 在西藏拉萨研究侵袭性Bidens pilosa和Tagetes minuta的发芽和早期生长.
- 评估种子埋藏深度,地理来源和气候对其建立的影响.
- 为高海拔地区的入侵植物提供风险评估和管理策略的信息.
主要方法:
- 评估了B. pilosa和T. minuta在拉萨不同种子埋藏深度和来源下的发芽率和早期生长.
- 从不同高度和当地适应 (拉萨生长季节) 的种子性能进行比较.
- 分析了三年来当地气候数据 (温度,降雨量).
主要成果:
- B. pilosa 在浅土壤中发芽最好,昆明来源的种子最初表现良好. 局部成熟减少了发芽,表明了高海拔压力.
- 在拉萨寒冷干燥的气候下,B. pilosa的高海拔来源显示了更好的植物高度.
- T. minuta的发芽率较低,但早期生长强,特别是在埋藏更深的地方,这表明它具有快速扩张的潜力.
- 拉萨的生长季节 (五月至十月),气温和降水增加,有利于两种物种.
结论:
- 高海拔压力会对母体种子质量产生负面影响,但局部适应也可能发生.
- 西藏高原的变暖和加湿趋势可能会促进入侵物种的建立和传播.
- 长期监测和预警系统对于高海拔地区的入侵植物管理至关重要.
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